Fuel-supply regulator for internal-combustion engines.



A. E. BRAY. ENEL SUPPLY REGULATQE P0P. INTERNAL COMBUSTION ENGINES.

APPLIGATION FILED JAN. 2l. 1911.

Patented Dec. 9, 1913.

3 SHEETS-SHEET 1.

A. E. BRAY. FUEL SUPPLY REGULATOR POR INTERNAL GOMBUSTION ENGINES. APPLICATION FILED JAN.21, 1911.

Patented Deo. 9, 1913.

3 SHEETS-SHEET 2.

Witwe/.wao vwe ufo-z 2 W. hm. M

A. E. BRAY. FUEL SUPPLY REGULATOR EOE INTERNAL COMBUSTION ENGINES.

APPLICATION FILED JAN.21, 1911. 1,@8,87.

Patented Dec. 9, 1913.

3 SHEETS-SHEET 3L ALFRED EIDVVIN BRAY, F LUBE-RTZY, RUSSA.

FUEL-SUPPLY REGULATOR FOR NTFJENAL-COMBUSTON ENGINES.

Application filed January 21, 1911..

Specification of Letters Patent.

Patented lec. 2J, i933.

serial no. 603,241.

To all whom t may concern.:

Ee it known that l, Airuno EDWIN. BRAY, a subject of the King of Great Britaln, and

a resident of the 'station Lubertzy of Mose cow-Fiasan Railway, Russiayengineerfhave invented new and useful llmpro-vementswin Fuel-Supply Regulatorsv for Tnternal-Combustion Engines, of which the following is :i specification;

My invention has for its object a novel mechanism forl regulating the fuel supply of internal combustionengines; Such mechmismA is-shown in the annexed drawing,in which- Figure lis a side view and Fig. 2 a front view of the mechanism Fig. 3 is a-longitudinal section of the fuel pump and Fig. e partly a'longitudinal section and-partly a side view of the regulating device.

@n the distributing shaft S of the engine two cams 1 are mounted, in Vengagementwith rollers 16, -loosely mounted on a pivot passing through the pin end of a lever 2, having its fulcrum at 2 on the engine frame. When the shaft S rotates, the cams 1, by means of the rollers 16 raise the lever 2 in the direction of the arrow C (Fig. 2). The cams 1' are held in engagement with the rollers 16 bythe weight of the lever` 2 il@ and the rollers. @nlever 2 is also mounted by means of a pivot 3 a bracket 4t, having two plates 5, 6, fastened to it. Thev bracket l is also provided with a rear projection 3 connected by meansv of a helical spring 7 with a stationary projection 3, extending from a depending lug Ll of the lever 2.'y The' spring 7 'tends'to turn the bracket i in the direction of the arrow A. (Fig. 2). The piston rod 9 of the `fuel pump 10l is pro- 4@ vided on its lower end with a block 8, being cut away at 8 and provided with a curviliiieal surface 8". Frein the block 8y projects an extension 38 entering a guiding slot 39 inthe engine frame.

35 fnl the' normal position of the parts, plate 6 on the bracket e bears with its upper end against the cut-away part 8" of the block 8 and lies in a recess formed between the cut-away' part 8 and the curved surface 5@ 3'. When the lever 2 is raised in the direction of the arrow C (Fig. ,2), the upper end of the plate 6 is forced against the block 8 on the lower endI of the piston rod 9, thereby pushing thel latter and thefpiston attachedv thereto inthe cylinder 10 upward, at the same time compressing the spring 22 inside the cylinder (F 3), feeding liquid fuel to the mixing chamber ofthe engine. rThe return stroke of the pump piston is effected by the spring 22.

Now, l will describe the device for regulat-ing the supply of the liquid fuel to the engine. @n a rotary spindle 23, arranged parallel with the shaft S, is mounted a hollow cone 11, in such a way that it will rotate with the spindle, but can move along the latter. The spindle 23 is rotated from the shaft S by means of the gears 23, 24. The gear 23 is secured to 'the spindle 23, and provided with an elongated hub 23. @n the inner end of said hub weights 26 are mounted on pivots 25, which weights on the rotation of the spindle 23, owing to centrifugal force, swing outward and exert on the cone 11 a pressure, which pressure increases with the increase in the number of revolutions of the spindle 23. Against the hub of the cone 11 bears a collar 2l loosely surrounding the spindle 23 and provided with two pivot pins 27 which are engaged by two links 12, which, in turn, are pivotally connected with a lever 13, `rigidly secured to an idler shaft lll, adapted to freely revolve in the engine frame. Rigidly secured to the same shaft lll is a lever 15, provided at its lower end with a slotor shoulder, adapted to be engaged by the upper edge of the plate 5 on bracket 4. A helical spring 17 bearing at one end against an adjustable nut 21 on spindle 23 and at its other end against the said collar 21', is wound around a reduced portion of spindle 23, and has for its purpose to shift the cone 1l back to its normal position on the spindle, as its rotation ceases.

ln testing the engine, the parts are so adjusted that when the engine runs at ordinary speed the slot or shoulder provided on the lower end of the lever 15 is not in' the path of the plate 5 on the bracket 4, whereas even upon a slight increase in the number of revolutions the lever 15 is moved into the path of the plate 5.

The operation of my new regulating device is as follows: Upon an increase in the .number of revolutions of the engine shaft S above the normal, the cone 11 is moved by the weights 26 toward the right in Fig. l, whereby the lever l5 is moved into the Apath of the plate 5 on bracket Ll. When in this position of the parts the lever 2 is lifted by means of the cams 1 and rollers 16, the plate 5 will strike against the lower end of lever 15.. Thereby the bracket i is swung about its pivot 3 in a direction opposite to the direction marked by the arrow A in Fig. 2'. Consequently the late 6 on bracket 4 will pass by the recess 1n the block 8 and the pump rod 9 will remain in inoperative position, so that the pump 10 will not supply any fuel to the engine. As the number of revolutions of the engine is thereby decreased to normal, the cone 11 will be moved back to its original position by the spring 17, and by means of lever 12, connected with the cone 11, the lever 15 will again be moved 4out of the paths of the plate 5, so that onv the next Aupward movement of lever 2 the plate 6 on bracket 4 will engage the recess in block 8, forcing the piston rod 9 upwardly in cylinder 10, thereby operating the fuel pump. The time when the cone 11 shall operate'can be easily determined by the tension of the spring 17, which can be regulated by the adjustable nut 21 on spindle 23. The stroke of the piston of the fuel pump 10 can also be regulated by hand so as to lncrease or reduce the quantity of the fuel supplied with each stroke of the iston. This is e'ected by the aid of a urled nut 18, which may be easily screwed up and down on the lower end of a cylinder 10 by hand whereby the extent of movement of the piston rod 9 and thus the stroke of the piston in the cylinder 10 can be increased or decreased at will. The nut 18 can be secured in position by a lock-nut 19 (Figs. 2 and 3). Thisregulation is resorted to when the engine is intended to work with a constant load for a long period. In order to stop the engine, the rollers 16 after studs 20 have been removed are moved to the positions shown in dotted lines and are held in said positions by said studs 2O which are put back into their places. ln this position of the rollers, the cams 1 cannot contact therewith. 0f course, one cam and one roller are suflicient for operating the fuel supply. The reason that two cams and two rollers are provided is to enable one to supply with one ump fuel twice in the course of one revolution.

What I claim is 1. In a device for regulating the fuel supply of internal combustion engines, the combination with the fuel pump, a piston rod therefor, and a distributing shaft of the engine, of a cam rotating therewith, a rotary spindle adapted to be rotated by said distributing shaft, a lever pivoted to the frame of the engine, adapted to be engaged by said cam, a bracket pivoted to said lever, two plates fastened to said bracket, one of said plates adapted to engage the piston rod of the fuel pump, a stop arranged to be movedl into the path of the other plate to prevent the first mentioned plate from engaging the piston rod, a hollow cone rotatably connected with said rotary spindle, but adapted to -l move axially thereon, Weights pivoted to said cone and adapted to move the same lengthwise on said rotary spindle, a spring arranged to resist said movement and means connecting said hollow cone and said stop and adapted tomove said stop into the path of said plate upon a predetermined increase of the speed of rotation of said rotary spindle above normal.

2. In a device for regulating the fuel supply of internal combustion engines, the combination with the fuel pump, a piston rod therefor, and a distributing shaft of the engine, of a cam rotating therewith, a rotary spindle, adapted to be rotated by said distributing shaft, a lever pivoted to the frame of the engine, means on said lever adapted to be engaged by said cam to lift said lever about its pivot, a bracket pivoted to said lever, two plates fastened to said bracket, one of said plates adapted to engage the piston rod of the fuel pump, a stop arranged to be `lmoved into the path of the other plate to prevent the first mentioned plate from engaging the piston rod, a holi low cone rotatably connected with said rotary spindle, but adapted to move axially thereon, weights pivoted to said cone and adapted to move the same lengthwise on said rotary spindle, a spring arranged to resist said movement and means connecting said hollow cone and said stop and adapted to move said stop into the path of said plate upon a predetermined increase of the speed of rotation of said rotary spindle above normal, and an adjustable nut on said rotary spindle for regulating the tension of said spring, thereby determining the period of shutting off the fuel supply.

3. In a device for regulating the fuel supply of internal combustion engines` the combination with the fuel pump, a piston rod therefor, and a distributing shaft of the engine, of a cam rotating therewith, a rotary spindle adapted to be rotated by said distributing shaft, a lever pivoted to the frame of the engine, means on said lever adapted to be engaged by said cam to lift said lever about its pivot, a bracket pivoted to said lever, two'plates fastened to said bracket, one of said plates adapted to engage the piston rod of the fuel pump, L stop arranged to be moved into the path of the other plate to prevent the first mentioned plate from engaging the piston rod, a hollow cone rotatably connected with said rotary spindle, but adapted to move axially thereon, weights pivoted to said cone and adapted to move the same lengthwise on said rotary spindle, a spring arranged to resist 'sa-id movement and means connecting said hollow cone and Said stop and adaptln testimony whereof, I have signed my ed to more said stop into the path of said name Vto this specification in the presence plate upon a, predetermined increase of the of two subscribing Witnesses.

speed of rotation of said rotary spindle ALFRED EDWIN BRAY.

- above normal7 and a nut at the lower end Witnesses:

of the pump cylinder for varying the stroke GUsTAv C. HARLWIG, of the piston of the fuel pump. y JOHN H. SNODGRASS. 

